Knocking

Knocking or Knockin or Knockin'  may refer to:


 * Knocking, Austria, a hamlet, subdivision of Erlauf (municipality) in Austria
 * Knocking (2006 film), a documentary about Jehovah's Witnesses
 * Knocking (2021 film), a Swedish thriller film
 * "Knockin'" (song), by Spanish band Double Vision (1995)
 * Engine knocking, or the sound accompanying automotive combustion malfunction
 * Port knocking, a covert method of opening a port on a server
 * Roof knocking, a bombing practice of the Israeli Defense Forces
 * Gene knockin, genetic engineering method
 * Knockin Castle, castle situated in the village of Knockin on Shropshire between Oswestry and Shrewsbury